untransform-distance

Function

Summary

Transforms a distance by the rotation and scale of the inverse of a given transform.

Package

graphics-ports

Signature

untransform-distance
transform
dx
dy
=>
x
,
y

Arguments

transform

A transform.

dx

A real number.

dy

A real number.

Values

x

A real number.

y

A real number.

Description

The
untransform-distance
function transform the distance (
dx dy
) by the rotation and scale of the effective inverse of
transform
. The translation in the inverse transform is ignored. The transformed distance (
dx dy
) is returned as two values.